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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65a315ca85a1ffb625636e1e2c71b952c979bdcd9d12b25ab38fae7e2cfa3b94' 
  AND token = 'tMpz8Yv4eH4Tc8C+j3njl7FschpxLjh/zhje2anO0l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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