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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '062f81bfbcc952ed2609dff6f103ab78b249e98a2938f9aa8eb0b6f890758c2e' 
  AND token = 'NXEhHBhGi5F/GaDXMO36d6kNTEEeG1UsiCgGnCyriIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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