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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0bb33ef1b39cc27e33dd4695cd8f414ef3dfa85b22808f446d698f21a0fd273c' 
  AND token = 'JUQG7yypnWCHwWyu6iOCX607Mwd7DEbzzM7WaM7fi58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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