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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5987699dd25f1270513b3761085b0b34b2b0dc9fc1ea6d6b4467c0b4138b400b' 
  AND token = 'GRfdichpnh/AtRNmz7w+kpbg1gB6fd+6VWAkr10QNXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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