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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82354d4053e35e80c1633ca2a899b4d3a3073e282de85a03d02732cc3c863b16' 
  AND token = 'PO2pTkV7WFEm4yxeFS4Cj1cy9xVfcQj/RqeXNE+e6CE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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