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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '087ce1c5207f0a86c5cd5ca30e4e2a9da3fbec124e26b0b2567c14996b8c70de' 
  AND token = 'WMa8Z2PFGnbX52XfH47VOghdWgsM7QwapPqKTB0adVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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