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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3bb1bebd0938e26f21065b29f4e65254f809d34a983756f49df06ee502176ee' 
  AND token = 'fqTkQekCP6U+o+caOkCxjSjY5SZ6bd/Q9mT1Zj4kGJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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