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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '611700fe4c197fa5bf5d50e028956b477cfa0635b38057087fbc5d42b3d4724c' 
  AND token = 'w2M/02oH2DG2zbXjtkoN12y2W7pwQImKlB58RBdNHAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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