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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd537180fd26c8effbf2e01e1eec4f33e8c62ebbed178ec8b4596c45c02f6eeb9' 
  AND token = 'P0QZNj7QQztsesRlQbrfD42WlTQ78JC/u122BaefJ+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00081

JSON explain

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