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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a2d407d066a2f6852e0e8e821b73cee886c60af4cd10d476580cf40c3184860' 
  AND token = 'YO2Z5dTluABVeKrXwHOwYm4h4jK4WwVdY1rD+AL+o0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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