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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9c118869346d22a0dc0459645d8538a676bebba83698950f28ce0fd1567c473' 
  AND token = 'YT/dA1PCnEBj1/xqWR6F42C0dX9IQ5cbVN620T+IB3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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