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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0172737d124b302d295a15eb65db9f593e79333dd201907f74b93cbf2e9ed58b' 
  AND token = 'G5EQ860o3B+u6mGxfDzP0/QmyWIarflDY5oV83IIPwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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