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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f95122aa6f4b225c0dbac1ac7a8d386fcf6811435b099d1a68d894b72a6815cb' 
  AND token = 'NDO6SI539Hh1q2wscc9f/EsCGJGjJ6UahDvHHw1do5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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