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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28ae59e9867ab87667e78cec2e3904e4189503e68ae102ecc24064101dab125' 
  AND token = 'aYhkISqTS/7TNR4W8VdbUgajKYAzkXEvuj35VHMIauM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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