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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b3b7b62867153a6f242fe795c24bcf700847782964ee366417e33324bd11104' 
  AND token = 'ImmQ713HcsGyDW0zuA0g087oTB5k0WwgfR7ygXOFZEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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