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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbdf8d67bed71a13774a979f876e1007165d6b1264e8b0071598eb02361ac97a' 
  AND token = 'Lnj1ts+KO8Piu0y7owmrn7sMd8nx3cTN9ghgtoJPumc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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