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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e656cc415d536bda0f4ead49e8c5a1b2d149684eb3df968ed9226e9512865f8' 
  AND token = '58OckhcUJe5x3FYCXFgkICCXAwbmCGaQtJK2SF6nzeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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