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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a2e2afb602edd1a836b1cd8a93c031cc5a34e413f9397f7970daf383e91999' 
  AND token = 'YnDnJ1qaebxBXN9e7nSo6FHeaYkEsh7dqfpSU+2vkX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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