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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0bfb7668570fea06eabb41ae409988d7bcf22de916e964f74fc459ba211cec8' 
  AND token = '3l5t1N1Go4v/s9VuBE5JICDn+oXuvrQp8lZJwwW1ja0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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