SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '465bd5d87cd15725aa00aab938402f8a35ef4ffd2d5bf2fdff77824b5920c8b6' 
  AND token = 'ehj/tFQ+aNIqCWsDviLke+OvYeE0GTz7ue/gJ5pt/q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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