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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97dd54a7e36f1ea9ff18793b2b0261c582d3150c8fc6e27912f46e082a23eeba' 
  AND token = 'TED5UffwH9ZS7czTv2TAzc8Fx0G9d9YtmwpyXZf+qkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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