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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd2e6be32c8f20b98b6762c0cdaa5914a372ed69b878253ae1c4083dcc58fd8d' 
  AND token = 'QBgrTR0Uf65KDbMr416Weza9zNW3L9P98A2AiPFY42A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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