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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ed94b03d4e424c04ec5973820c14703ef2f736127b0b1428973040d7ec200b1' 
  AND token = 'Yx2VPqzVksdSZHEZ2hqSfH1LlsXmgtO9Eo5ZI7fUERw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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