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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b286fdd0561d53f3153bfbbeaf7ca588c0d73bd32cb9f89a180cd79dfb92a11b' 
  AND token = 'J+hhNNESzTfZJAzlm0W6H98j5BrW+FPrXDXk9H0OSvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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