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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3e10594e0fe287fbddd3894ddf1de752dea61d02165fe6e32513a67e02569f1' 
  AND token = 'kiPX7dR7Ptrq/N0BRho9LM9N/6KwUQ3iTuKaV2R2Uo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00105

JSON explain

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