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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2aceb27f71be60da19e902b419c8be80321c790dbe6addc4f655934bc20c41d' 
  AND token = 'WzROCPpPckuARpp7eBdquHLGz+aL3sC2KlqEbXKzF+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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