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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25dac58ae6621c6bdb3725eb277342674560c0c168d941e07c0c32c10ab68e89' 
  AND token = '/BSO3MDME9t5tdnvX2HV+lOJ/AVrmExLSrekTULGNWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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