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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09149fa61f6d5c8557901000841208f0ee393621db0c99088306bd312c4c87d9' 
  AND token = '6FTLLkvDHwbcF0DurcDgsfJ3Qeig4RW5YuYN0/Nen5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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