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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79960968634aae2c9d3c75885bec9bba2059c99705ceba7a17f195d5a365ac98' 
  AND token = 'L7npPrAPgemnolWPF6ZeIwaFnirnTs8G8cms8twcZtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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