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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccce84365e6fe11ad7765fbd9943c10e06918e6d5ef2694860ac60e151dd288e' 
  AND token = 'bjOtBZwBB1+q/HoMf6tef/XjuoDyTmyRKT9RquNRIEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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