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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f220ce79142c8634cbff5d34df39d6f12bce51ba152c4460b46bdd1765b4051' 
  AND token = 'ub/RXg583LvJCokqT1RxItiGfqUD3OuPpfbu6iSkhxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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