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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6aac522aaec3cef2906e3c2a1814a025d26e88356417f7134e6811dfd023dc1' 
  AND token = 'HFVoT8PwTYal4I9+s3myGLSLOvMiPBr1AZq1J+y1h/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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