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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eec42fb0c84f936669232293c34d741fda287cc3ba7b5a55149b994604ef3ef' 
  AND token = 'pqCEJVHyMT8HPpGTc9sZr8Bi5TT/JAajSgMpW399reY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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