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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e067acbdd3af9f07a4c3b184f776e0816e6c33ef7127fceae44e89da71d5896b' 
  AND token = 'cjFpvDXrQ5neYBit3s2HD7HBt2raTzs4v/2px0oiHh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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