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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f57f4005b365c74a0133b43cdc6888ea81a820c0bef88c0201c2e5d5b6cadcc5' 
  AND token = 'NGpgs7e1iYNXtcd/KyqkTjt8vSYZ/ntHRRJQbSTZjrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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