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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2862a032a25cb6e0153351fca57644c0b5ca92913fb7e010c493dc2bf8ee565a' 
  AND token = 'S+vPgiQ6j+OEuZmbh5Y/TwbUOSDyB/zWt5afOTzspW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

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