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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'a18f74a39d70b9fccaae453c94a20ad9081692b4f3c7aea3ecb522329ae6c46d' 
  AND token = 'fgQ0h02xC2HbFAVMlTokG9LCwVQj/niKROu1lX1P6x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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