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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d7d748092a0523af2e757c5faf93d7931acd6442b0e28b69116ea7c805a3c01' 
  AND token = '+2FHNAQAo69dOf1zigEaswcY7ED1xaXLsy5lTQZ9G7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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