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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '184e3b99688c084a6080b347cc71bdf058a5ac80a2d14136ccb51bb671a2a531' 
  AND token = 'qlpJzJm6NnQuFEPZ8xTAguPk3bkjvo8A2SF8xbGgj4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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