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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0657a12d5f385ff3f79d787accc25dd9604009e27db9ee948ddd52226fa1cdd0' 
  AND token = 'JM/TW5k6g8C0bpAa/wc5PNi5712SgBajiGNjsgrCUhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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