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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8595b8fd204408bb5e53e9fe0da54c465299c1aec2517eb17023e5fc2e245377' 
  AND token = 'x7C0rhN4NH0gZPNk5MlQ2hhvaC05ACOCDgIRE55Jskg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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