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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfb1a3b7cf40b0f571b7c77b46edf54b076b4b9e96dff64ddcd3299646819095' 
  AND token = 'TI18QxfBvCMq8y9O7N9mX9EKsxf2UOkJoq9IXwIiRRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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