Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be418c7935dddc95e7d1d0f1b01ef749bcae97d57ab7563f97f88f133d01e6fe' 
  AND token = 'z3MmepvmZ1YwLdGn1DBjczc3E9DLx96wrrs7mbA7Uzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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