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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '632e57a504c80e06d246c8599d1d01ef9b4a020a1e660babcd6bcbf14e450f5a' 
  AND token = 'vK9UZH6IqvaGx84ncNJnKFtvSXhXe8WzosTqe57m4IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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