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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee02d06c67a3be8ed77e0a50657539fe06898c0ed85e85cdd45e116028b5cc6' 
  AND token = '9kLm/2+Acv+i11yh+fJ8ADecrRYLVTtm6TTIKp9bq5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}