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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ac0501be1ccc4e2e0bc87ea67612c8bf4e3f3a6b3654398ecf97a13a0621cd6' 
  AND token = 'ctcZLPiW3Pgojrkkrdn8vMI3RvGRBDYFkSSyKJprS/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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