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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b749f4dbeed2da15a3e3cb037083c7e9a85aa61172c66eadca89da0c71ce0d' 
  AND token = 'nrzajLT3gAjBQMBHDs0eqq1xh3if0ZpF6cvMqfSQ60s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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