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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '384e000bead01fdc25a20230c852d498961a8a8ac75dabe8327d26407eda9823' 
  AND token = '+aId3DmZUS4IgQz9ORP4fAXwCsQC0PKkIWL32ATW02I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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