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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f0e77f541aa832622b6e698c82a44da6614f79d00d85627925a42a0bca7f54c' 
  AND token = 'LqiojYkJdJU2TljEBH+fncdNrGzBeRHFBoca/C4corI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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