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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'e064bdcbb58f4ddae73934e036d7b5cf05d10c18561289f3624a0e8d43b9a7ba' 
  AND token = 'wFobykSnR4JZ4WY8dD1IDWnKI5uchdb5AMtHDt6iLY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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