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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fde3e7ef68288b0c5861bc816217d52de7d93a60ab772fb3522e86a5af550124' 
  AND token = 'Xd36ybqXP60vq9IWwO9VUvtV64L5Ewoq7KhotNDhLLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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