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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ebe7e96cdcaaeccffad633cfa1ae48864314607f08a7b413a2ec99cbcdd3e18' 
  AND token = 'UT50axYgu5sPBvaJXX7f+BQByGD/5Mps4VP8x+jAlaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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