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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0107e3408afc27f9ac7f0c179bca0243b55976afe57bbdd6bcfa8ae4e928013d' 
  AND token = 'W7RckT/HYbxa//sYi7JM0TUhKOC3NeEbQ0LhrtVO6Gc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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