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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e9a0258a3b6c2a691a0dc21bae4be1851a23b282bfbd2bbea130d637ec5785f' 
  AND token = '3zxG/qGSH30HSXZiny52Y/v1D+UP6XJo39x/vQPRagE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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