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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afbe201374369b744101327285ab5884c11a6302f9a1e35ded826ac18e482b82' 
  AND token = 'cta4s3TeIltOTF6DRAvMXn2Ugl9eKqGnj/kQeksyah4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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