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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e904def4e55dd5d48587d6c0e8a4d917e2667f793dd12b14ebd738c592804044' 
  AND token = 'F+SzW1p3hd83hjLUmrlq29kx8NKQup8dbZclvd8Ed3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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