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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41b3b6bc2b033682285a9d0d428de72fb324ed81fc90cd46404bb0288668018e' 
  AND token = '1p77/DNVpKrgAxPNv+2baBaQxgIQwaLlTciX22DVJJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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