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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32da7733262bf65b546b30cab62fbd03da66e22d9c9933b3bae7e6ddff7b8eb1' 
  AND token = '2RqCi4cWtqT9dekj/KCA0FDr4ictqKo2K3P5sx+qq08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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