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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24366121f0a97ccae542dc9ed528deea049b4e10adfe7bee1bc6cd06b3aff0cf' 
  AND token = 'Nz6C6wtHAtVNO/p5vjye9Fv6ylQYFxoo+NPjREf4VXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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