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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b0cf02e9bc23ad1fb704812531794f426bd3b10e0fb75afd3c51ad72e46fd0' 
  AND token = 'X7v8L3fT7d1f5gHB8l2/DJZ1IHeZ1JdrnSyc8FfchDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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